dt-bindings: cache: qcom,llcc: Add SA8775p description

Add the cache controller compatible and register region descriptions for
SA8775p platform.

Signed-off-by: Tengfei Fan <quic_tengfan@quicinc.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20240529101534.3166507-2-quic_tengfan@quicinc.com


Signed-off-by: Bjorn Andersson <andersson@kernel.org>